Dolmabahçe Mosque, also called the Bezm-i Alem Valide Sultan Mosque (Turkish: Dolmabahçe Camii, Bezm-i Alem Valide Sultan Camii), is a historic mosque located in the Beşiktaş district of Istanbul, Turkey. The mosque was constructed between 1853 and 1855 and was commissioned by Ottoman Sultan Abdülmecid I and his mother Valide Sultan Bezmiâlem.